This plugin provides the ability to configure editors per-post.
Plugin Tag: per page
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mklasen's Dynamic Widget
Add per-page/post configurable WYSIWYG editors as a widget to your sidebar.
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Background Per Page
Background Per Page allows you to set a custom background per page (or post) as well as set up a default background for all other pages/posts.
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AddFunc Head & Footer Code
Easily add code to your head, footer and/or immediately after the opening body tag, site-wide and/or on any individual page/post.